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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Which of the following pairs of elements have the same number of valence electrons?

    A) \[Zn,O\]                             

    B) \[Cl,S\]      

    C) \[\text{Na,Ca}\]                             

    D) \[C,\,Ge\]

    Correct Answer: D

    Solution :

    Carbon and germanium have the same number of valence electrons as they belong to the same group.


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